Machinist&#39;s v-block.



No. 709,873. Patented Sept. 30, I902. E. m. c033 & E. A. SPAULDING.

MACHINISTS V-BLOCK.

(Application filed Dec. 19, 1901 (No Model.)

UNITED STATES PATENT OFFICE.

ELMER M. COBB AND EUGENE A. SPAULDING, OF PORTLAND, MAINE.

MACHINISTS V-BLOCK.

SPECIFICATION formingpart of Letters Patent No. 709,873, dated September30, 1902.

Application filed December 19, 1901. $erial No- 86,484. (No model.)

To all whom it may concern:

Be it known that We, ELMER M. COBB and EUGENE A. SPAULDING, citizens ofthe United States of America, and residents of Portland, Cumberlandcounty, State of Maine, have invented certain new and usefulImprovements in Machinists V-Blocks, of which the following is aspecification.

Our invention relates to V-blocks such as are used by machinists fordrilling and otherwise working round or hexagonal rods, &c. Such blocksare now made in a single piece, and it often happens that it is desiredto so pportapiece of work too long for a single block.

The object of our invention is to construct a V-block which will beadapted to working all diameters which are commonly used inmachine-shops and which may be extended to support various lengths. Tothis end we form our tool of a pair of V-blocks having the notches inline with each other, connecting them by means of one or more guides,upon which one of the blocks is adapted to s1ide,-so that the distancebetween them may be increased or diminished at will.

We have illustrated our invention by means of the accompanying drawings,in which Figure l is a perspective view of our device,

I and Fig. 2 is a cross-section through one of the blocks.

A and B represent two V-blocks, having on one side large notches d andon the-opposite side smaller notches e and f to accommodate variousdiameters. The block A is provided with a vertical hole a to provide aclearance for the drill after it passes through the Work. The two blocksare so disposed that their notches will be in exact line with each otherand so that they may both be used for supporting the same rod, and theyare connected by means of oneor more guide-rods C, so that onemay bemade to slide along the rod toward and away from the other. As hereshown, the rods are rigidly secured to the block A while they passthrough the block B, so as to slide thereon. A screw 0 is provided forthe end of one of the rods for a stop, so that the block B may be pulledout to the end of the rods C without slipping off.

The device as made forms a machinists tool which may be easily packed ina tool-chest and which may be used for all sizes of work which arelikely to be drilled in a machine- S. W. BATES, HARRY B. Russ.

